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    <title>Limited Layer Extent</title>
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        <a class="navbar-brand" href="./"><img src="./resources/logo-70x70.png">&nbsp;OpenLayers 3 Examples</a>
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      <div class="row-fluid">
  <div class="span12">
    <div id="map" class="map"></div>
  </div>
</div>
<div class="btn-group">
  <button type="button" class="btn btn-default" id="northwest">northwest</button>
  <button type="button" class="btn btn-default" id="northeast">northeast</button>
  <button type="button" class="btn btn-default" id="southeast">southeast</button>
  <button type="button" class="btn btn-default" id="southwest">southwest</button>
  <button type="button" class="btn btn-default" id="world">world</button>
</div>


      <div class="row-fluid">
        <div class="span12">
          <h4 id="title">Limited Layer Extent</h4>
          <p id="shortdesc">Restricting layer rendering to a limited extent.</p>
          <div id="docs"><p>This example uses the <code>layer.setExtent()</code> method to modify the extent of the overlay layer.  Use the controls below to limit rendering based on an extent.</p>
</div>
          <div id="tags">extent, tilejson</div>
          <div id="api-links">Related API documentation: <ul class="inline"><li><a href="../apidoc/ol.Map.html" title="API documentation for ol.Map">ol.Map</a></li>,<li><a href="../apidoc/ol.View.html" title="API documentation for ol.View">ol.View</a></li>,<li><a href="../apidoc/ol.layer.Tile.html" title="API documentation for ol.layer.Tile">ol.layer.Tile</a></li>,<li><a href="../apidoc/ol.proj.html" title="API documentation for ol.proj">ol.proj</a></li>,<li><a href="../apidoc/ol.source.TileJSON.html" title="API documentation for ol.source.TileJSON">ol.source.TileJSON</a></li></ul></div>
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        <form method="POST" id="jsfiddle-form" target="_blank" action="http://jsfiddle.net/api/post/jquery/1.11.0/">
          <textarea class="hidden" name="js">function transform(extent) {
  return ol.proj.transformExtent(extent, &#x27;EPSG:4326&#x27;, &#x27;EPSG:3857&#x27;);
}

var extents &#x3D; {
  northwest: transform([-180, 0, 0, 85]),
  northeast: transform([0, 0, 180, 85]),
  southeast: transform([0, -85, 180, 0]),
  southwest: transform([-180, -85, 0, 0]),
  world: transform([-180, -85, 180, 85])
};

var base &#x3D; new ol.layer.Tile({
  source: new ol.source.TileJSON({
    url: &#x27;http://api.tiles.mapbox.com/v3/&#x27; +
        &#x27;mapbox.world-black.jsonp&#x27;,
    crossOrigin: &#x27;anonymous&#x27;
  })
});

var overlay &#x3D; new ol.layer.Tile({
  extent: extents.northwest,
  source: new ol.source.TileJSON({
    url: &#x27;http://api.tiles.mapbox.com/v3/&#x27; +
        &#x27;mapbox.world-glass.jsonp&#x27;,
    crossOrigin: &#x27;anonymous&#x27;
  })
});

var map &#x3D; new ol.Map({
  layers: [base, overlay],
  target: &#x27;map&#x27;,
  view: new ol.View({
    center: [0, 0],
    zoom: 1
  })
});

for (var key in extents) {
  document.getElementById(key).onclick &#x3D; function(event) {
    overlay.setExtent(extents[event.target.id]);
  };
}
</textarea>
          <textarea class="hidden" name="css"></textarea>
          <textarea class="hidden" name="html">&lt;div class&#x3D;&quot;row-fluid&quot;&gt;
  &lt;div class&#x3D;&quot;span12&quot;&gt;
    &lt;div id&#x3D;&quot;map&quot; class&#x3D;&quot;map&quot;&gt;&lt;/div&gt;
  &lt;/div&gt;
&lt;/div&gt;
&lt;div class&#x3D;&quot;btn-group&quot;&gt;
  &lt;button type&#x3D;&quot;button&quot; class&#x3D;&quot;btn btn-default&quot; id&#x3D;&quot;northwest&quot;&gt;northwest&lt;/button&gt;
  &lt;button type&#x3D;&quot;button&quot; class&#x3D;&quot;btn btn-default&quot; id&#x3D;&quot;northeast&quot;&gt;northeast&lt;/button&gt;
  &lt;button type&#x3D;&quot;button&quot; class&#x3D;&quot;btn btn-default&quot; id&#x3D;&quot;southeast&quot;&gt;southeast&lt;/button&gt;
  &lt;button type&#x3D;&quot;button&quot; class&#x3D;&quot;btn btn-default&quot; id&#x3D;&quot;southwest&quot;&gt;southwest&lt;/button&gt;
  &lt;button type&#x3D;&quot;button&quot; class&#x3D;&quot;btn btn-default&quot; id&#x3D;&quot;world&quot;&gt;world&lt;/button&gt;
&lt;/div&gt;
</textarea>
          <input type="hidden" name="wrap" value="l">
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        </form>
        <pre><code id="example-source" class="language-markup">&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
&lt;title&gt;Limited Layer Extent&lt;/title&gt;
&lt;script src="https://code.jquery.com/jquery-1.11.2.min.js"&gt;&lt;/script&gt;
&lt;link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css"&gt;
&lt;script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"&gt;&lt;/script&gt;
&lt;link rel="stylesheet" href="http://openlayers.org/en/v3.11.1/css/ol.css" type="text/css"&gt;
&lt;script src="http://openlayers.org/en/v3.11.1/build/ol.js"&gt;&lt;/script&gt;

&lt;/head&gt;
&lt;body&gt;
&lt;div class="container-fluid"&gt;

&lt;div class&#x3D;&quot;row-fluid&quot;&gt;
  &lt;div class&#x3D;&quot;span12&quot;&gt;
    &lt;div id&#x3D;&quot;map&quot; class&#x3D;&quot;map&quot;&gt;&lt;/div&gt;
  &lt;/div&gt;
&lt;/div&gt;
&lt;div class&#x3D;&quot;btn-group&quot;&gt;
  &lt;button type&#x3D;&quot;button&quot; class&#x3D;&quot;btn btn-default&quot; id&#x3D;&quot;northwest&quot;&gt;northwest&lt;/button&gt;
  &lt;button type&#x3D;&quot;button&quot; class&#x3D;&quot;btn btn-default&quot; id&#x3D;&quot;northeast&quot;&gt;northeast&lt;/button&gt;
  &lt;button type&#x3D;&quot;button&quot; class&#x3D;&quot;btn btn-default&quot; id&#x3D;&quot;southeast&quot;&gt;southeast&lt;/button&gt;
  &lt;button type&#x3D;&quot;button&quot; class&#x3D;&quot;btn btn-default&quot; id&#x3D;&quot;southwest&quot;&gt;southwest&lt;/button&gt;
  &lt;button type&#x3D;&quot;button&quot; class&#x3D;&quot;btn btn-default&quot; id&#x3D;&quot;world&quot;&gt;world&lt;/button&gt;
&lt;/div&gt;

&lt;/div&gt;
&lt;script&gt;
function transform(extent) {
  return ol.proj.transformExtent(extent, &#x27;EPSG:4326&#x27;, &#x27;EPSG:3857&#x27;);
}

var extents &#x3D; {
  northwest: transform([-180, 0, 0, 85]),
  northeast: transform([0, 0, 180, 85]),
  southeast: transform([0, -85, 180, 0]),
  southwest: transform([-180, -85, 0, 0]),
  world: transform([-180, -85, 180, 85])
};

var base &#x3D; new ol.layer.Tile({
  source: new ol.source.TileJSON({
    url: &#x27;http://api.tiles.mapbox.com/v3/&#x27; +
        &#x27;mapbox.world-black.jsonp&#x27;,
    crossOrigin: &#x27;anonymous&#x27;
  })
});

var overlay &#x3D; new ol.layer.Tile({
  extent: extents.northwest,
  source: new ol.source.TileJSON({
    url: &#x27;http://api.tiles.mapbox.com/v3/&#x27; +
        &#x27;mapbox.world-glass.jsonp&#x27;,
    crossOrigin: &#x27;anonymous&#x27;
  })
});

var map &#x3D; new ol.Map({
  layers: [base, overlay],
  target: &#x27;map&#x27;,
  view: new ol.View({
    center: [0, 0],
    zoom: 1
  })
});

for (var key in extents) {
  document.getElementById(key).onclick &#x3D; function(event) {
    overlay.setExtent(extents[event.target.id]);
  };
}

&lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;</code></pre>
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    <script src="./resources/prism/prism.min.js"></script>
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